Skip to main content
WorldIP.io
CIDR Range

199.89.128.0/21

2.0K IPs /21 United States ARIN
Addresses
2,048
2.0K
IP Range
199.89.128.0
→ 199.89.135.255
Sub-ranges
17+
within this block
PTR Density
26.9%
551 of 2.0K IPs have PTR

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

70/100
Moderate
How this score is built

Experimental · trust-vectors model v1.2.1 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 199.89.128.0/21

CIDRIPsOrganizationASNCountry
199.89.128.0/23 512 — — US
199.89.132.0/23 512 — — US
199.89.132.0/23 512 AT&T Technical Services Company, Inc. AS3555 US
199.89.132.0/23 512 AT&T Technical Services Company, Inc. AS3555 US
199.89.128.0/24 256 NetEnterprise Inc. AS11563 US
199.89.135.0/24 256 — — US
199.89.134.0/24 256 — — US
199.89.134.0/24 256 AdaptGroup AS402931 US
199.89.134.0/24 256 AdaptGroup AS402931 US
199.89.131.0/24 256 — — US
199.89.131.0/24 256 — — US
199.89.130.0/24 256 — — US
199.89.130.0/24 256 National Nuclear Security Administration, Kansas City Plant AS3424 US
199.89.130.0/24 256 National Nuclear Security Administration, Kansas City Plant AS3424 US
199.89.129.0/24 256 — — US
199.89.128.0/24 256 NetEnterprise Inc. AS11563 US
199.89.135.0/24 256 — — US

First 256 of 2,048 IP addresses in 199.89.128.0/21

199.89.128.0 199.89.128.1 199.89.128.2 199.89.128.3 199.89.128.4 199.89.128.5 199.89.128.6 199.89.128.7 199.89.128.8 199.89.128.9 199.89.128.10 199.89.128.11 199.89.128.12 199.89.128.13 199.89.128.14 199.89.128.15 199.89.128.16 199.89.128.17 199.89.128.18 199.89.128.19 199.89.128.20 199.89.128.21 199.89.128.22 199.89.128.23 199.89.128.24 199.89.128.25 199.89.128.26 199.89.128.27 199.89.128.28 199.89.128.29 199.89.128.30 199.89.128.31 199.89.128.32 199.89.128.33 199.89.128.34 199.89.128.35 199.89.128.36 199.89.128.37 199.89.128.38 199.89.128.39 199.89.128.40 199.89.128.41 199.89.128.42 199.89.128.43 199.89.128.44 199.89.128.45 199.89.128.46 199.89.128.47 199.89.128.48 199.89.128.49 199.89.128.50 199.89.128.51 199.89.128.52 199.89.128.53 199.89.128.54 199.89.128.55 199.89.128.56 199.89.128.57 199.89.128.58 199.89.128.59 199.89.128.60 199.89.128.61 199.89.128.62 199.89.128.63 199.89.128.64 199.89.128.65 199.89.128.66 199.89.128.67 199.89.128.68 199.89.128.69 199.89.128.70 199.89.128.71 199.89.128.72 199.89.128.73 199.89.128.74 199.89.128.75 199.89.128.76 199.89.128.77 199.89.128.78 199.89.128.79 199.89.128.80 199.89.128.81 199.89.128.82 199.89.128.83 199.89.128.84 199.89.128.85 199.89.128.86 199.89.128.87 199.89.128.88 199.89.128.89 199.89.128.90 199.89.128.91 199.89.128.92 199.89.128.93 199.89.128.94 199.89.128.95 199.89.128.96 199.89.128.97 199.89.128.98 199.89.128.99 199.89.128.100 199.89.128.101 199.89.128.102 199.89.128.103 199.89.128.104 199.89.128.105 199.89.128.106 199.89.128.107 199.89.128.108 199.89.128.109 199.89.128.110 199.89.128.111 199.89.128.112 199.89.128.113 199.89.128.114 199.89.128.115 199.89.128.116 199.89.128.117 199.89.128.118 199.89.128.119 199.89.128.120 199.89.128.121 199.89.128.122 199.89.128.123 199.89.128.124 199.89.128.125 199.89.128.126 199.89.128.127 199.89.128.128 199.89.128.129 199.89.128.130 199.89.128.131 199.89.128.132 199.89.128.133 199.89.128.134 199.89.128.135 199.89.128.136 199.89.128.137 199.89.128.138 199.89.128.139 199.89.128.140 199.89.128.141 199.89.128.142 199.89.128.143 199.89.128.144 199.89.128.145 199.89.128.146 199.89.128.147 199.89.128.148 199.89.128.149 199.89.128.150 199.89.128.151 199.89.128.152 199.89.128.153 199.89.128.154 199.89.128.155 199.89.128.156 199.89.128.157 199.89.128.158 199.89.128.159 199.89.128.160 199.89.128.161 199.89.128.162 199.89.128.163 199.89.128.164 199.89.128.165 199.89.128.166 199.89.128.167 199.89.128.168 199.89.128.169 199.89.128.170 199.89.128.171 199.89.128.172 199.89.128.173 199.89.128.174 199.89.128.175 199.89.128.176 199.89.128.177 199.89.128.178 199.89.128.179 199.89.128.180 199.89.128.181 199.89.128.182 199.89.128.183 199.89.128.184 199.89.128.185 199.89.128.186 199.89.128.187 199.89.128.188 199.89.128.189 199.89.128.190 199.89.128.191 199.89.128.192 199.89.128.193 199.89.128.194 199.89.128.195 199.89.128.196 199.89.128.197 199.89.128.198 199.89.128.199 199.89.128.200 199.89.128.201 199.89.128.202 199.89.128.203 199.89.128.204 199.89.128.205 199.89.128.206 199.89.128.207 199.89.128.208 199.89.128.209 199.89.128.210 199.89.128.211 199.89.128.212 199.89.128.213 199.89.128.214 199.89.128.215 199.89.128.216 199.89.128.217 199.89.128.218 199.89.128.219 199.89.128.220 199.89.128.221 199.89.128.222 199.89.128.223 199.89.128.224 199.89.128.225 199.89.128.226 199.89.128.227 199.89.128.228 199.89.128.229 199.89.128.230 199.89.128.231 199.89.128.232 199.89.128.233 199.89.128.234 199.89.128.235 199.89.128.236 199.89.128.237 199.89.128.238 199.89.128.239 199.89.128.240 199.89.128.241 199.89.128.242 199.89.128.243 199.89.128.244 199.89.128.245 199.89.128.246 199.89.128.247 199.89.128.248 199.89.128.249 199.89.128.250 199.89.128.251 199.89.128.252 199.89.128.253 199.89.128.254 199.89.128.255 + 1.8K more (range too large to list inline)

RIR Ownership History

Atom feed ⇲

Allocation changes captured from regional internet registry (RIR) delegation files, re-imported every six hours.

Date Event From To
2026-10-07 New Allocation — US
2026-05-10 New Allocation — US

Frequently Asked Questions

What is 199.89.128.0/21?

199.89.128.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 199.89.128.0 to 199.89.135.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 199.89.128.0/21 network?

The 199.89.128.0/21 range is allocated to an unknown organization from United States.

Last updated: 2026-10-21 10:24:05 UTC
Share